The mean of 50 observation is 20 .if each of observation is multiplied by 3 then what is the new mean?
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Given that the mean of 50 observations is 20.
Let the 50 observations be x1,x2,x3......+x50.
(x1 + x2 + x3....+x50)/50 = 20
(x1 + x2 + x3...+x50) = 20 * 50
(x1 + x2 + x3...+x50) = 1000 --------- (1).
Given that each of observations is multiplied by 3.
Therefore the new observations will be
3x1,3x2,3x3....+3x50
Therefore the new mean = (3x1 + 3x2 + 3x3....+3x50)/20
= 3(x1 + x2 + x3...+x50)/20
= 3(1000)/20
= 150.
Therefore the new mean = 150.
Hope this helps!
Let the 50 observations be x1,x2,x3......+x50.
(x1 + x2 + x3....+x50)/50 = 20
(x1 + x2 + x3...+x50) = 20 * 50
(x1 + x2 + x3...+x50) = 1000 --------- (1).
Given that each of observations is multiplied by 3.
Therefore the new observations will be
3x1,3x2,3x3....+3x50
Therefore the new mean = (3x1 + 3x2 + 3x3....+3x50)/20
= 3(x1 + x2 + x3...+x50)/20
= 3(1000)/20
= 150.
Therefore the new mean = 150.
Hope this helps!
siddhartharao77:
it is x.
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8
Answer:here is ur answer
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